Enter special characters in Microsoft Word using shortcuts:

• Accent Required Keyboard Shortcut
• à, è, ì, ò, ù CTRL + ` (accent grave), the letter
• á, é, í, ó, ú, ý CTRL + ' (apostrophe), the letter
• â, ê, î, ô, û CTRL + SHIFT + ^ (caret), the letter
• ã, ñ, õ CTRL + SHIFT + ~ (tilde), the letter
• ä, ë, ï, ö, ü, ÿ CTRL + SHIFT + : (colon), the letter
• å, Å CTRL + SHIFT + @, a or A
• æ, Æ CTRL + SHIFT + &, a or A
• œ, Œ CTRL + SHIFT + &, o or O
• ç, Ç CTRL + , (comma), c or C
• ð, Ð CTRL + ' (apostrophe), d or D
• ø, Ø CTRL + /, o or O
• ¿ ALT + CTRL + SHIFT + ?
• ¡ ALT + CTRL + SHIFT + !
• ß CTRL + SHIFT + &, s

Copied from https://homepages.westminster.org.uk/it_new/faq/accent_shortcuts.html
by John Witney